Gradle Minify Plugin!

A simple gradle plugin to minify CSS and JavaScript files.

Uses Google Closure Compiler and custom Google Closure Stylesheets for minification.

Getting started

Add Plugin

plugins {
  id("org.gradlewebtools.minify") version "<version>"
}

Default Task Configuration

Minimal Configuration

minification {
    js { //this: JsMinifyTask
        srcDir = project.file("js")
        dstDir = project.file("build/js")
    }
    css { //this: CssMinifyTask
        srcDir = project.file("css")
        dstDir = project.file("build/css")
    }
}

Tasks

If you need more than one minification task's you should add them manually. Therefore, this plugin provides the task types JsMinifyTask and CssMinifyTask.

Creating additional JsMinifyTask

tasks.create<JsMinifyTask>("additionalJsMinify") { //this: JsMinifyTask
    srcDir = project.file("js")
    dstDir = project.file("build/js")
}

task additionalJsMinify(type: org.gradlewebtools.minify.JsMinifyTask) {
    srcDir = project.file("js")
    dstDir = project.file("build/js")
}

Creating additional CssMinifyTask

tasks.create<CssMinifyTask>("additionalCssMinify") { //this: CssMinifyTask
    srcDir = project.file("css")
    dstDir = project.file("build/css")
}

task cssMinify(type: org.gradlewebtools.minify.CssMinifyTask) {
    srcDir = project.file("css")
    dstDir = project.file("build/css")
}

Options

Note: Enum properties must be specified by their fully qualified classname.

JsMinifyTask

tasks.create<JsMinifyTask>("additionalJsMinify") { //this: JsMinifyTask
    srcDir = project.file("js")
    dstDir = project.file("build/js")
    options {
        ignoreMinFiles = false
        compilationLevel = com.google.javascript.jscomp.CompilationLevel.SIMPLE_OPTIMIZATIONS
        env = com.google.javascript.jscomp.CompilerOptions.Environment.BROWSER
        languageIn = null
        languageOut = null
        warningLevel = com.google.javascript.jscomp.WarningLevel.QUIET
        extraAnnotationNames = listOf()
        strictModeInput = false
        debug = false
        exportLocalPropertyDefinitions = false
        formatting = listOf()
        generateExports = false
        renamePrefixNamespace = null
        renameVariablePrefix = null
        moduleResolution = com.google.javascript.jscomp.deps.ModuleLoader.ResolutionMode.BROWSER
        processCommonJsModules = false
        packageJsonEntryNames = listOf()
        angularPass = false
        forceInjectLibrary = listOf()
        polymerVersion = null
        rewritePolyfills = false
        charset = kotlin.textCharsets.UTF_8
        checksOnly = false
        browserFeaturesetYear = null
        createSourceMaps = false
        originalFileNames = false
        copyOriginalFile = false
    }
}

task additionalJsMinify(type: org.gradlewebtools.minify.JsMinifyTask) {
    srcDir = project.file("js")
    dstDir = project.file("build/js")
    options.ignoreMinFiles = false
    options.compilationLevel = com.google.javascript.jscomp.CompilationLevel.SIMPLE_OPTIMIZATIONS
    env = com.google.javascript.jscomp.CompilerOptions.Environment.BROWSER
    options.languageIn = null
    options.languageOut = null
    warningLevel = com.google.javascript.jscomp.WarningLevel.QUIET
    options.extraAnnotationNames = listOf()
    options.strictModeInput = false
    options.debug = false
    options.exportLocalPropertyDefinitions = false
    options.formatting = listOf()
    options.generateExports = false
    options.renamePrefixNamespace = null
    options.renameVariablePrefix = null
    moduleResolution = com.google.javascript.jscomp.deps.ModuleLoader.ResolutionMode.BROWSER
    options.processCommonJsModules = false
    options.packageJsonEntryNames = listOf()
    options.angularPass = false
    options.dartPass = false
    options.forceInjectLibrary = listOf()
    options.polymerVersion = null
    options.rewritePolyfills = false
    charset = kotlin.textCharsets.UTF_8
    options.checksOnly = false
    options.browserFeaturesetYear = null
    options.createSourceMaps = false
    options.originalFileNames = false
    options.copyOriginalFile = false
}

option	effect	values	default
srcDir	Sets source directory	File?	null
dstDir	Sets destination directory	File?	null
options	Sets JS minifier options	js options	js options

JsMinifyTask options

option		effect	values	default
ignoreMinFiles		ignore files named ".min."	true, false	false
compilationLevel		Specifies the compilation level to use	com.google.javascript.jscomp.CompilationLevel	com.google.javascript.jscomp.CompilationLevel.SIMPLE_OPTIMIZATIONS
env		Determines the set of builtin externs to load	com.google.javascript.jscomp.CompilerOptions.Environment	com.google.javascript.jscomp.CompilerOptions.Environment.BROWSER
languageIn		Sets the language spec to which input sources should conform	com.google.javascript.jscomp.CompilerOptions.LanguageMode
languageOut		Sets the language spec to which output should conform	com.google.javascript.jscomp.CompilerOptions.LanguageMode
warningLevel		Specifies the warning level to use	com.google.javascript.jscomp.WarningLevel	com.google.javascript.jscomp.WarningLevel.QUIET
extraAnnotationName		A whitelist of tag names in JSDoc	list of strings	null
strictModeInput		Assume input sources are to run in strict mode.	true, false	false
debug		Enable debugging options	true, false	false
exportLocalPropertyDefinitions		Generates export code for local properties marked with @export	true, false	false
formatting		Specifies which formatting options, if any, should be applied to the output JS	com.google.javascript.jscomp.CommandLineRunner.FormattingOption	null
generateExports		Generates export code for those marked with @export	true, false	false
renamePrefixNamespace		Specifies the name of an object that will be used to store all non-extern globals	string	null
renameVariablePrefix		Specifies a prefix that will be prepended to all variables	string	null
moduleResolution		Specifies how the compiler locates modules	com.google.javascript.jscomp.deps.ModuleLoader.ResolutionMode	com.google.javascript.jscomp.deps.ModuleLoader.ResolutionMode.BROWSER
processCommonJsModules		Process CommonJS modules to a concatenable form	true, false	false
packageJsonEntryNames		Ordered list of entries to look for in package.json files when processing modules with the NODE module resolution strategy	list of strings	["browser", "module", "main"]
angularPass		Generate $inject properties for AngularJS for functions annotated with @ngInject	true, false	false
dartPass		Rewrite Dart Dev Compiler output to be compiler-friendly	true, false	false
forceInjectLibrary		Force injection of named runtime libraries. The format is where is the name of a runtime library	base, es6_runtime, runtime_type_check	empty list
polymerVersion		Which version of Polymer is being used	1, 2	null
rewritePolyfills		Rewrite ES6 library calls to use polyfills provided by the compiler's runtime	true, false	false
charset		Input and output charset for all files	java.nio.charset.Charset	By default, we accept UTF-8 as input and output US_ASCII
checksOnly		Don't generate output. Run checks, but no optimization passes	true, false	false
browserFeaturesetYear		Browser feature set year	2012, 2019, 2020	0
emitUseStrict		Whether 'use strict' should be added to the file	true, false	true

See Google Closure Compiler for more information

CssMinifyTask

tasks.create<CssMinifyTask>("additionalCssMinify") { //this: CssMinifyTask
    srcDir = project.file("css")
    dstDir = project.file("build/css")
    options {
        ignoreMinFiles = false
        inputOrientation = com.google.common.css.JobDescription.InputOrientation.LTR
        outputOrientation = com.google.common.css.JobDescription.OutputOrientation.LTR
        outputFormat = com.google.common.css.JobDescription.OutputFormat.COMPRESSED
        copyrightNotice = null
        trueConditionNames = listOf()
        allowDefPropagation = true
        allowUnrecognizedFunctions = true
        allowedNonStandardFunctions = listOf()
        allowedUnrecognizedProperties = listOf()
        allowUnrecognizedProperties = true
        vendor = null
        allowKeyframes = true
        allowWebkitKeyframes = true
        processDependencies = true
        excludedClassesFromRenaming = listOf()
        simplifyCss = true
        eliminateDeadStyles = false
        cssRenamingPrefix = ""
        preserveComments = false
        outputRenamingMapFormat = com.google.common.css.OutputRenamingMapFormat.JSON
        compileConstants = mapOf()
        options.sourceMapLevel = com.google.common.css.JobDescription.SourceMapDetailLevel.DEFAULT
        createSourceMaps = false
        originalFileNames = false
        copyOriginalFile = false
    }
}

task cssMinify(type: org.gradlewebtools.minify.CssMinifyTask) {
    srcDir = project.file("css")
    dstDir = project.file("build/css")
    options.ignoreMinFiles = false
    options.inputOrientation = InputOrientation.LTR
    options.outputOrientation = OutputOrientation.LTR
    outputFormat = com.google.common.css.JobDescription.OutputFormat.COMPRESSED
    options.copyrightNotice = null
    options.trueConditionNames = listOf()
    options.allowDefPropagation = true
    options.allowUnrecognizedFunctions = true
    options.allowedNonStandardFunctions = listOf()
    options.allowedUnrecognizedProperties = listOf()
    options.allowUnrecognizedProperties = true
    options.vendor = null
    options.allowKeyframes = true
    options.allowWebkitKeyframes = true
    options.processDependencies = true
    options.excludedClassesFromRenaming = listOf()
    options.simplifyCss = true
    options.eliminateDeadStyles = false
    options.cssRenamingPrefix = ""
    options.preserveComments = false
    outputRenamingMapFormat = com.google.common.css.OutputRenamingMapFormat.JSON
    options.compileConstants = mapOf()
    options.sourceMapLevel = com.google.common.css.JobDescription.SourceMapDetailLevel.DEFAULT
    options.createSourceMaps = false
    options.originalFileNames = false
    options.copyOriginalFile = false
}

option	effect	values	default
srcDir	Sets source directory	File?	null
dstDir	Sets destination directory	File?	null
options	Sets CSS minifier options	css options	css options

CSSMinifyTask options

option	effect	values	default
ignoreMinFiles	ignore files named ".min."	true, false	false
inputOrientation	inputOrientation	com.google.common.css.JobDescription.InputOrientation	com.google.common.css.JobDescription.OutputOrientation.LTR
outputOrientation	outputOrientation	com.google.common.css.JobDescription.OutputOrientation	com.google.common.css.JobDescription.OutputOrientation.LTR
outputFormat	outputFormat	com.google.common.css.JobDescription.OutputFormat	com.google.common.css.JobDescription.OutputFormat.COMPRESSED
copyrightNotice	copyrightNotice	String	null
trueConditionNames	trueConditionNames	list of strings	empty list
allowDefPropagation	allowDefPropagation	true, false	true
allowUnrecognizedFunctions	allowUnrecognizedFunctions	true, false	true
allowedNonStandardFunctions	allowedNonStandardFunctions	list of strings	empty list
allowedUnrecognizedProperties	allowedUnrecognizedProperties	list of strings	empty list
allowUnrecognizedProperties	allowUnrecognizedProperties	true, false	true
vendor	vendor	com.google.common.css.Vendor	null
allowKeyframes	allowKeyframes	true, false	true
allowWebkitKeyframes	allowWebkitKeyframes	true, false	true
processDependencies	processDependencies	true, false	true
excludedClassesFromRenaming	excludedClassesFromRenaming	list of strings	empty list
simplifyCss	simplifyCss	true, false	true
eliminateDeadStyles	eliminateDeadStyles	true, false	false
cssRenamingPrefix	CSS renaming prefix	String	empty string
preserveComments	preserveComments	true, false	false
outputRenamingMapFormat	outputRenamingMapFormat	com.google.common.cssOutputRenamingMapFormat	com.google.common.cssOutputRenamingMapFormat.JSON
compileConstants	compileConstants	map	empty map
sourceMapLevel	sourceMapLevel	com.google.common.css.JobDescription.JobDescription.SourceMapDetailLevel	com.google.common.css.JobDescription.JobDescription.SourceMapDetailLevel.DEFAULT